Perhaps you should try some spelling variations:
22quality control » _quality control, byquality control, forquality control
2.4 reliability » 2.6 reliability, 5.4 reliability, 2.2 reliability
ic reliability » 5 reliability, 2 reliability, 7 reliability
2 safety » 5 safety, 4 safety, 3 safety

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((22quality control) OR (quality control))%((2.4 reliability) OR (ic reliability))%2 safety AND risk%22.
• Adding a wildcard symbol may retrieve word variants: %((22quality control) or (quality control))%((2.4 reliability) or (ic reliability))%2 safety and risk%22*.